Personal computer makers' call centers are buzzing these days.

Traffic is increasing because of the copious features PCs come equipped with -- features many people find difficult to use.

In the last few years, the call centers have noticed a change in the type of questions. Whereas in the old days most calls came from computer geeks looking for technical information, now "about 70 percent of consultations are about how to use PCs," an official at NEC Corp. said.